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SPIRIT LEVEL.

No. 508,762. Patented NOV. 14, 1893.

NITED STATES;

HERMANN OTTO RI ssE,

OF LEIPSIO, GERMANY.

SPIRIT-LEVEL.

SPECIFICATION forming part of Letters Patent N0. 508,762, dated November14, 1893.

Application filed May 10, 1893.

To (ZZZ whom it may concern:

Be it known that I, HERMANN OTTO RIssE, a subject of the Emperor ofGermany, residing at Leipsic, in the Kingdom of Saxony, German Empire,have invented; certain new and useful Improvements in Spirit-Levels, ofwhich the following is a full, clear, and exact specification.

This invention has for its object to provide a new and improved spiritlevel which may be used the same as ordinary spirit levels; and alsoforindicatingthe inclination of other than plane surfaces, such forexample as shafts or cylinders.

To accomplish this object my invention consists in the features ofconstructionand the combination or arrangement of devices hereinafterdescribed and claimed, reference being made to the accompanyingdrawings, in which Figure l is a plan view ofa spirit level constructedin accordance with my invention. Fig. 2 is a sectional side elevation ofthe same; and Fig. 3 is a plan view showing the end sections adjustedout of coincidence with the body of the spirit level. i

In order to enable. those skilled in the art to make and use myinvention, Iwill now de-' scribe the same in detail, referring to thedrawings, wherein the letters a, and b indi? cate two spirittubes'fixed'at right angles to' each other in the body of theinstrument,which latter is constructed of malleable iron, or some othermaterial capable of resisting shocks or strains. The main tube a ispreferably placed within the body of the instrument, so that it .isvisible through openings at the top and each side of a cover plate 0,and the secondary tube bis visible from both sides of the instrument.The openings to both tubes may be covered by disks, plates, or pieces ofglass to shield and protect the tubes.

The sides and the top and bottom of the body of the instrument arerectilinear and parallel to the main tube a; and the end sections d, don the body of the instrument are parallel to the secondary'tube b. Theend sections at, d aregrooved at their three outer or exposed sides, asindicated at f, f, and these end sections are susceptible of move-Serial No. 473,681. (No model.)

instrument.

In Fig. 1 the end sections d, d are shown in their normal positions,while in Fig. 3 they are shown adjusted laterally out of coincidencewith the body of the instrument. The lateral adjustment of the endsections is accomplished through the medium of rotatable screws 9 g,journaled to rotate in the end portions of the body of the instrumentand engaging screw nutse c which are rigidly fixed in any suitablemanner to the laterally adjustable end sections d 61 It is verydesirable that both end sections be adjusted to the same degree, for thepurpose of obtaining parallelism of the main tube a, and the cylindricalor other surface being tested; and to accomplish this object I providespring-controlled pins k and k, which are mounted on the body of theinstrument, and are provided with finger pieces 1" r, by which they maybe ment upon the extremities of the body of the drawn outward todisengage the inner ends of the pins from recesses or holes in the innersides h h of the end sections 01', (P. Then the end sections areadjusted laterally through the medium of the screws 9 g, thespringpressed pins will spring into the recesses or holes in the innersides h h of the end sections, so that the latter can be adjusted to thesame extent. The grooved construc-' 'tion of adjustable end' piecesenables these parts to rest firmly upon any shaped surface, as forinstance a shaft or cylinder. Having thus described my invention, what Iclaim is 1. A spiritlevel having laterally adjustable end sections, oneor more, substantially as de scribed.

2. A spiritlevel having laterally adjustable end sections provided withtially as described.

3. The combination with the body of a spirit level, of laterallyadjustable end sections carrying screw nuts, and screws mounted on thebody of the instrument and engaging the screw nuts for adjusting theendsections laterally, substantially as described.

7 4. The combination with the body of a spirit level, of laterallyadjustable end sections, means for adjusting the end sections, and

grooves, substanspring-pressed pins adapted to snap into encarried bythe body of the instrument and I0 gagement with the adjustable endsectionsfi adapted to snap into engagement with the substantially asdescribed. end sections, substantially as described.

5. The combination withthe body of a spirit l In witness whereof I havehereunto set my level, of laterally adjustable end sections pro- 9 handin presence of two witnesses. vided with grooves and carrying screwnuts, 5 IIERMANN OTTO RISSE. screws mounted on the body of the instrulWitnesses: ment and engaging the screw nuts for adjust- CARL HARING,

ing the end sections, and spring-pressed pins CARL BORNGRAEBER.

